I am using Lumina LU-400PAIR. How can I access trigger code when I use XID extension in Presentation software?

I have trigger cable plugged into Trigger Input port and Lumina is in the "Lumina" mode. After successfully installing the extension I can see Lumina response box in the Response devices, but it shows only four response buttons and no code for the trigger. For some reason in Presentation I don't have access to the serial port which receives the input from Lumina trigger (I get "access denied" error message).

This problem is not present when Lumina works in ASCII mode and I contact with it through Presentation's serial port devices section. When trigger is detected I get '53' code.